Left tackle Jake Long's returning to Miami remains a possibility. He left St. Louis on Friday, ending a three-day visit without signing a contract. The Dolphins are reportedly still interested. It's possible the market isn't as lucrative as Long hoped.

Also, former Atlanta cornerback Brent Grimes, one of the top free agents at his position, visited with Dolphins officials Friday. Grimes, a six-year veteran who played only one game last season because of an Achilles injury, could be a solution to fill the void left by Sean Smith, who signed with Kansas City.

Regardless of what happens with Bess and Long, the Dolphins have done their best to revamp their anemic passing offense through aggressive moves in free agency.

"We are happy that Brandon is joining the team," Dolphins general manager Jeff Ireland said. "Coupled with the earlier addition today of Dustin Keller, we feel that we have added some very good pieces to our passing game."

Ireland has signed former Pittsburgh wide receiver Mike Wallace, adding the much-needed deep threat; Keller, adding the much-needed pass-catching tight end and underneath receiver; and Gibson, adding another wide receiver who has big-play ability.

All of those additions followed re-signing wide receiver Brian Hartline.

On paper, the Dolphins undoubtedly have upgraded their passing game, giving it diversity as well as big-play threats.

"I think in today's NFL, in this day and age, you've got to have more than one or two ways to get people the ball," Gibson said, adding, "I really feel like this is a young and talented group, and if we stick together, we can be very good."

As for Bess, the Dolphins, by releasing linebackers Karlos Dansby and Kevin Burnett, have shown they aren't afraid of making head-turning moves. On the other hand, Bess isn't expensive ($2.6 million) and may again be the No. 1 slot receiver. If not, he'd provide excellent depth if Gibson becomes the No. 1 slot receiver.

Although conventional football wisdom says you don't win when you spend a lot of money in free agency, the new guys — Wallace, Keller, Gibson and linebackers Dannell Ellerbe and Phillip Wheeler